From ba880dad9a5313a640a350f88ff1027a82bc7088 Mon Sep 17 00:00:00 2001
From: Cheng Zhou <zhoucheng857@gmail.com>
Date: Tue, 31 Mar 2026 09:44:49 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E7=A7=BB=E9=99=A4=E5=89=8D=E7=AB=AF=20A?=
 =?UTF-8?q?PI=20=E7=8E=AF=E5=A2=83=E5=85=A5=E5=8F=A3?=
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---
 frontend/.env.example            |  1 -
 frontend/src/api/axios.ts        |  5 +----
 frontend/src/api/baseUrl.test.ts | 19 -------------------
 frontend/src/api/baseUrl.ts      | 12 ------------
 4 files changed, 1 insertion(+), 36 deletions(-)
 delete mode 100644 frontend/src/api/baseUrl.test.ts
 delete mode 100644 frontend/src/api/baseUrl.ts

diff --git a/frontend/.env.example b/frontend/.env.example
index 81f4a110..73a9682d 100644
--- a/frontend/.env.example
+++ b/frontend/.env.example
@@ -1,5 +1,4 @@
 # Frontend feature flags and timeline overrides
-VITE_API_BASE_URL=
 VITE_STARTUP_SUBMIT_ACCEPT_TIMEOUT_MONTHS=3
 VITE_STARTUP_ACCEPT_TIMEOUT_MONTHS=3
 VITE_STARTUP_ACCEPT_APPROVAL_TIMEOUT_MONTHS=6
diff --git a/frontend/src/api/axios.ts b/frontend/src/api/axios.ts
index 0ae6aba3..e669ed03 100644
--- a/frontend/src/api/axios.ts
+++ b/frontend/src/api/axios.ts
@@ -7,12 +7,9 @@ import { useStudyStore } from "../store/study";
 import { TEXT } from "../locales";
 import { extendAccessToken, forceLogout, lockSession, markNetworkActive } from "../session/sessionManager";
 import { useSessionStore } from "../store/session";
-import { resolveApiBaseUrl } from "./baseUrl";
-
-const apiBaseUrl = resolveApiBaseUrl(import.meta.env.VITE_API_BASE_URL);
 
 const instance: AxiosInstance = axios.create({
-  baseURL: apiBaseUrl,
+  baseURL: "/",
   timeout: 15000,
 });
 
diff --git a/frontend/src/api/baseUrl.test.ts b/frontend/src/api/baseUrl.test.ts
deleted file mode 100644
index 521baee7..00000000
--- a/frontend/src/api/baseUrl.test.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import { describe, expect, it } from "vitest";
-import { resolveApiBaseUrl } from "./baseUrl";
-
-describe("resolveApiBaseUrl", () => {
-  it("defaults to same-origin root when no env override is set", () => {
-    expect(resolveApiBaseUrl(undefined)).toBe("/");
-    expect(resolveApiBaseUrl("")).toBe("/");
-    expect(resolveApiBaseUrl("   ")).toBe("/");
-  });
-
-  it("preserves explicit root", () => {
-    expect(resolveApiBaseUrl("/")).toBe("/");
-  });
-
-  it("trims whitespace and trailing slashes from absolute base urls", () => {
-    expect(resolveApiBaseUrl(" http://localhost:8000/ ")).toBe("http://localhost:8000");
-    expect(resolveApiBaseUrl("https://api.example.com///")).toBe("https://api.example.com");
-  });
-});
diff --git a/frontend/src/api/baseUrl.ts b/frontend/src/api/baseUrl.ts
deleted file mode 100644
index 17657095..00000000
--- a/frontend/src/api/baseUrl.ts
+++ /dev/null
@@ -1,12 +0,0 @@
-const trimTrailingSlashes = (value: string): string => value.replace(/\/+$/, "");
-
-export const resolveApiBaseUrl = (rawValue: string | undefined): string => {
-  const normalized = rawValue?.trim() ?? "";
-  if (!normalized) {
-    return "/";
-  }
-  if (normalized === "/") {
-    return "/";
-  }
-  return trimTrailingSlashes(normalized);
-};